中国启动建设首个高放废物处置地下研究实验室

中国已在戈壁沙漠启动其首个地下研究实验室的建设工作,以确定该区域对未来地质处置中国51座运行核电厂产生的乏核燃料等高放废物的适宜性。

地下研究实验室将使中国科学家能够充分获取该场址的地质特征,并确定其对高放废物处置库的适宜性。(照片来源:地研院)

中国已在戈壁沙漠启动其首个地下研究实验室的建设工作,以确定该区域对未来地质处置中国51座运行核电厂产生的乏核燃料等高放废物的适宜性。该实验室的建设历经30多年的研究,其间得到了原子能机构的支持。科学家将利用该实验室获取场址岩石的地质、水文、地球化学和工程特征,并进行评价。

中国自1985年以来一直致力于为高放废物处置库选定合适的场址,从1999年开始,原子能机构为这项工作提供了支持。正在建设该地下研究实验室的核工业北京地质研究院(地研院)副院长陈亮说:“高放废物安全处置对于中国核工业的可持续发展至关重要。”

中国的高放废物处置战略包括三个阶段:第一阶段是实验室研究和初步选址,已于2020年完成。第二阶段是在地下研究实验室建设开始后,于2021年至2050年开展地下现场试验。最后阶段是处置设施建设,计划在现场试验证明该区域适宜性的前提下于2041年至2050年开展建设处置设施。

高放废物可以保持放射性长达数千到数十万年。 对于其安全可靠的长期管理,国际公认的解决方案是在地下数百米的设施中进行地质处置。芬兰的地质处置设施已经进入建设阶段。(观看视频昂加洛 — 核废物解决方案了解更多详情。)

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地下研究实验室的建议场址位于中国甘肃省北山地区,北接戈壁沙漠。(照片来源:杰拉德·尼德-韦斯特曼/原子能机构)

原子能机构支持

作为原子能机构通过技术合作计划提供支持的一部分,35位中国专家和11位国际专家在今年年初参加了为期六周的线上专家服务,为支持现场实验室计划提供输入、指导和建议。

原子能机构废物处置组组长斯特凡·约尔格·迈耶表示:“地下研究实验室的建设是推进地质处置设施科学和工程方面进展的机会,也是各国未来能源可持续发展的一个重要组成部分。”“尽管受到新冠疫情的限制,我们还是通过设计和组织安排了一次创新的线上专家服务,为中国建设这个新研发设施提供专家协助。”

线上专家服务于2月25日至4月9日进行。通过14次在线互动会议,专家们审查和评价了地下研究实验室的建设计划。专家们还审查了为处置设施编制安全论证文件以及为利益相关方参与所做的准备工作。

原子能机构计划管理官员皮特·萨拉说:“在地下研究实验室开建之前,地研院请原子能机构为其确定岩体特征以及科学研究提供支持。”“通过这种创新的方式组织专家服务,我们召集了一支由资深专家组成的团队,他们就中国同行提议的一系列专题进行了讨论。”

参与审查的瑞士专家皮耶特·朱伊德马说:“我们深入讨论了不同专题之间的相互关系,从处置库的设计到放射性废物管理及其对当前所调查场址特性的相应要求。”

这一系列广泛领域的讨论不仅提出了与建设有关的建议,而且还提供了与建设阶段期间实验室研发计划的实施有关的指导意见。

陈亮副院长表示:“这次线上专家服务非常及时,因为地下实验室建设将于今年夏天开工,它为这项工作提供了关键的支持,为促进中国核工业的可持续发展做出了重要贡献。”

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核工业北京地质研究院的专家团队参加了线上专家服务,以分享他们在开发地下研究实验室方面的经验。(照片来源:地研院)

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The proposed site of the Underground Research Laboratory lies in the Beishan area of China’s Gansu Province, which is bound from the north by the Gobi Desert. (Photo: G. Nieder-Westermann/IAEA)

IAEA support

As part of the support from the IAEA, under the technical cooperation programme, 35 Chinese and 11 international experts took part in a six-week virtual expert mission earlier this year to provide input, guidance and recommendations to support plans for the in-situ laboratory.

“The construction of an underground research laboratory is an opportunity for advancement in the science and engineering of geological disposal facilities and an essential component in a sustainable energy future for countries,” said Stefan Joerg Mayer, Head of the Disposal Team at the IAEA. “Despite the constraints of the pandemic, we were able to design, organize and lead an innovative virtual mission to provide expert assistance to China in the construction of this new R&D facility.”

The virtual mission took place from 25 February to 9 April. In a series of 14 online, interactive meetings, the experts reviewed and assessed the plans for the construction of the underground research laboratory. They also reviewed the preparations being made for the development of a safety case for the disposal facility as well as for stakeholder engagement.

“BRUIG requested the IAEA to provide support on characterisation of the rock mass, as well as scientific research, prior to the construction of the URL.,” said Petra Salame, IAEA Program Management Officer. “Through this innovative way of organizing the expert mission, we were able to bring together a team of senior experts who addressed a broad range of topics that were proposed by our Chinese counterparts.”

“We discussed in-depth the interdependencies between the different thematic topics, from repository designs to radioactive waste management and their corresponding requirements on the properties of the site currently investigated,” said Piet Zuidema, an international expert from Switzerland participating in the review.

The broad range of areas covered resulted in recommendations related to construction, but also guidance related to the implementation of its laboratory R&D plans during the construction phase.

“This virtual Expert Mission was very timely as construction of the underground laboratory began this summer and it provided critical support to this effort,” said Chen. “It has made a great contribution in promoting the sustainable development of China's nuclear industry.”

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A team of experts from the Beijing Research Institute of Uranium Geology participate in the virtual expert mission to share their experiences in the development of the Underground Research Laboratory. (Photo: BRIUG)